A connection structure of a floor support plate and a full-bolted joint
By setting equal-thickness side cantilever plates and studs at the fully bolted joints, the problems of unevenness and grout leakage in the steel truss floor slabs were solved, achieving flatness and concrete integrity at the joints and improving the stress and seismic performance of the connection joints.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-16
AI Technical Summary
In prefabricated steel frame structures, fully bolted joints can lead to unevenness in the steel truss floor slabs, making them prone to grout leakage and affecting the integrity of the concrete at the joints.
A side cantilever plate with the same thickness as the flange is set at the fully bolted joint, and studs are installed on the side cantilever plate to ensure the flatness of the floor deck. At the same time, shear force and tensile force are transferred by fixing the high-strength bolts to the connecting plate and steel beam.
This ensured the flatness of the steel truss floor slab at the connection node, prevented grout leakage, improved the integrity of the concrete at the node, and enhanced the stress performance and seismic performance of the connection node.
Smart Images
Figure CN224363457U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fully bolted joints, specifically a connection structure between a floor deck and a fully bolted joint. Background Technology
[0002] When a prefabricated steel frame structure adopts a fully bolted joint, a connecting plate and high-strength bolts are set on the upper flange of the steel beam based on the principle of equal strength connection. The width and thickness of the upper flange connecting plate are the same as the flange. At the same time, high-strength bolts are set on the upper flange of the joint connection. The high-strength bolts in the joint area will protrude from the beam surface.
[0003] The Chinese utility model patent with authorization announcement number CN214402177U, published on October 15, 2021, discloses a prefabricated side plate node for steel beams and steel pipe concrete vertical components. While ensuring that the node connection is rigid and safe and reliable, it avoids on-site welding of the node and realizes on-site full bolt connection of the node, solving the problems of difficult bolt tightening and cumbersome construction in closed sections. However, the floor decking at the fully bolted node position directly overlaps the upper flange connection plate, which will cause local elevation. Moreover, the overlap elevation of the steel truss floor decking outside the fully bolted node is still located at the upper flange of the steel beam, making the steel truss floor decking uneven and prone to grout leakage during construction. Utility Model Content
[0004] To address the aforementioned technical problems, this utility model provides a connection structure between a floor deck and a fully bolted joint. A side cantilever plate with the same thickness as the flange is provided at the fully bolted joint to ensure the flatness of the steel truss floor deck at the connection joint, prevent grout leakage at the joint, and ensure the integrity of the concrete at the joint.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A connection structure between a floor deck and a fully bolted joint includes a steel beam, with side cantilever plates provided on the upper and lower outer walls of the steel beam. Studs penetrate the steel beam and the side cantilever plates and are fixed to the steel beam and the side cantilever plates. A connecting plate is fixed between the upper and lower side cantilever plates. High-strength bolts penetrate the connecting plate and the steel beam and are fixed to the connecting plate and the steel beam. The side cantilever plates are fixed to the floor deck.
[0007] Furthermore, the steel beam is an H-beam.
[0008] Furthermore, the thickness of the side cantilever plate is the same as the thickness of the steel beam flange.
[0009] Furthermore, the floor deck is a steel truss floor deck.
[0010] Furthermore, the connection between the connecting plate and the steel beam satisfies the following formula:
[0011] L1=(m-1)S1+2S0
[0012] L1 is the distance from the connecting plate to the splice of the steel beam; m is the number of high-strength bolts; S0 is the distance from the side cantilever plate to the edge of the high-strength bolts; S1 is the spacing between two adjacent high-strength bolts.
[0013] Furthermore, the total length of the multiple side cantilever panels satisfies the formula:
[0014] L2 = L1 + 4S2
[0015] In the formula, L1 is the distance from the connecting plate to the splice of the steel beam; L2 is the total length of multiple side cantilever plates; and S2 is the width of the side cantilever plate.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] 1. This utility model provides a side cantilever plate with the same thickness as the flange at the fully bolted joint to ensure the flatness of the steel truss floor slab at the connection joint, prevent grout leakage at the joint, and ensure the integrity of the concrete at the joint.
[0018] 2. The present invention provides studs on the side cantilever plate, which can effectively avoid the position of high-strength bolts and effectively transfer the shear and tensile forces between the steel beam and the floor deck.
[0019] 3. This utility model effectively improves the bending load of the joint by setting the lower chord and upper chord steel bars at the joint of the floor deck, and improves the stress performance and seismic performance of the connection joint. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a side view of the present invention;
[0022] Figure 3 This is a side view of the cantilever panel;
[0023] Figure 4 This is the front view of the side cantilever panel.
[0024] The attached diagram is labeled as follows:
[0025] 1. Steel beam; 2. Side cantilever slab; 3. Floor deck; 4. Connecting plate; 5. Stud; 6. High-strength bolt; 7. Bottom chord reinforcement; 8. Top chord reinforcement. Detailed Implementation
[0026] Please see Figures 1-4The connection structure between the floor deck and the fully bolted joint in this embodiment includes a steel beam 1, with side cantilever plates 2 on the upper and lower outer walls of the steel beam 1. Studs 5 penetrate the steel beam 1 and the side cantilever plates 2 and are fixed to the steel beam 1 and the side cantilever plates 2. A connecting plate 4 is fixed between the upper and lower side cantilever plates 2. High-strength bolts 6 penetrate the connecting plate 4 and the steel beam 1 and are fixed to the connecting plate 4 and the steel beam 1. The side cantilever plates 2 are fixed to the floor deck 3.
[0027] This solution involves installing a side cantilever plate 2 with the same thickness as the flange at the fully bolted joint. This side cantilever plate 2 is welded to the side of the flange of the steel beam 1 in the factory. The side cantilever plate 2 is flush with the steel beam 1 and is used to support the floor deck 3. This ensures the flatness of the floor deck 3 at the connection joint, prevents grout leakage at the joint, and ensures the integrity of the concrete at the joint. At the same time, the side cantilever plate 2 is equipped with studs 5, which can effectively avoid the position of the high-strength bolts 6 and effectively transfer the shear and tensile forces between the steel beam 1 and the floor deck 3.
[0028] Furthermore, steel beam 1 is an H-beam.
[0029] Furthermore, the thickness of the side cantilever plate 2 is the same as the thickness of the flange of the steel beam 1.
[0030] Furthermore, floor deck 3 is a steel truss floor deck.
[0031] By setting the lower chord reinforcement 7 and the upper chord reinforcement 8 at the 3-node of the floor slab, the bending load of the node is effectively improved, and the stress performance of the connection node and the seismic performance of the structure are improved.
[0032] Furthermore, the joint between connecting plate 4 and steel beam 1 satisfies the formula:
[0033] L1=(m-1)S1+2S0
[0034] In the formula, L1 is the distance from the splice of the connecting plate 4 to the steel beam 1; m is the number of high-strength bolts 6; S0 is the distance from the side cantilever plate 2 to the edge of the high-strength bolt 6; S1 is the spacing between two adjacent high-strength bolts 6. Based on the principle of equal strength of all bolts in the beam and column, the values of m, S0 and S1 are determined; the side cantilever plate 2 is the same width as the flange, and the thickness of the connecting plate 4 is the same as the flange.
[0035] Furthermore, the total length of the multiple side cantilever panels 2 satisfies the formula:
[0036] L2 = L1 + 4S2
[0037] In the formula, L1 is the distance from the splice of the connecting plate 4 to the steel beam 1; L2 is the total length of the multiple side cantilever plates 2; and S2 is the width of the side cantilever plate 2. Four side cantilever plates 2 are set in the node connection area and welded to both sides of the upper flange of the steel beam 1 respectively. The welding of the side cantilever plates 2 is completed in the factory. The top elevation of the side cantilever plate 2 is the same as that of the flange. The side cantilever plate 2 is flush with the flange of the steel beam 1. The thickness t of the side cantilever plate 2 is the same as that of the flange of the steel beam 1. The width of the side cantilever plate 2 is S2. The length of the side cantilever plate 2 extending from the connecting plate is 2S2, that is, the end slope is 1:2. The width of the side cantilever plate 2 is not less than 50mm.
[0038] The method of using this utility model is as follows:
[0039] This solution involves installing a side cantilever plate 2 with the same thickness as the flange at the fully bolted joint. This side cantilever plate 2 is welded to the side of the flange of the steel beam 1 in the factory. The side cantilever plate 2 is flush with the steel beam 1 and is used to support the floor deck 3. This ensures the flatness of the floor deck 3 at the connection joint, prevents grout leakage at the joint, and ensures the integrity of the concrete at the joint. At the same time, the side cantilever plate 2 is equipped with studs 5, which can effectively avoid the position of the high-strength bolts 6 and effectively transfer the shear and tensile forces between the steel beam 1 and the floor deck 3.
[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A connection structure between a floor deck and a fully bolted joint, comprising a steel beam (1), characterized in that, The upper and lower outer walls of the steel beam (1) are provided with side cantilever plates (2), and studs (5) penetrate the steel beam (1) and the side cantilever plates (2) and are fixed to the steel beam (1) and the side cantilever plates (2). A connecting plate (4) is fixed between the upper and lower side cantilever plates (2); high-strength bolts (6) penetrate the connecting plate (4) and the steel beam (1) and are fixed to the connecting plate (4) and the steel beam (1); the side cantilever plates (2) are fixed to the floor deck (3).
2. The connection structure between a floor decking and a fully bolted joint according to claim 1, characterized in that, The steel beam (1) is an H-beam.
3. The connection structure between a floor decking and a fully bolted joint according to claim 2, characterized in that, The thickness of the side cantilever plate (2) is the same as the thickness of the flange of the steel beam (1).
4. The connection structure between a floor decking and a fully bolted joint according to claim 1, characterized in that, The floor deck (3) is a steel truss floor deck.
5. The connection structure between a floor decking and a fully bolted joint according to claim 1, characterized in that, The joint between the connecting plate (4) and the steel beam (1) satisfies the following formula: L1=(m-1)S1+2S0 In the formula, L1 is the distance from the splice of the connecting plate (4) to the steel beam (1); m is the number of high-strength bolts (6); S0 is the distance from the side cantilever plate (2) to the edge of the high-strength bolt (6); and S1 is the spacing between two adjacent high-strength bolts (6).
6. The connection structure between a floor decking and a fully bolted joint according to claim 1, characterized in that, The total length of the multiple side cantilever panels (2) satisfies the formula: L2 = L1 + 4S2 In the formula, L1 is the distance from the splice of the connecting plate (4) to the steel beam (1); L2 is the total length of the multiple side cantilever plates (2); and S2 is the width of the side cantilever plate (2).